Air conditioning apparatus



Nov. 26, 1935. E. w. ROESSLER 2,022,523

AIR CONDITIONING APPARATUS Filed July 27, 1934 3 Sheets-Sheet 1 Ihvehtor: Edward W. Roessler,

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Nov. 26, 1935. I E. w. ROESSLER 2,022,523

AIR CONDITIONING APPARATUS Filed July 27, 1934 3 Sheets-Sheet 2 Q 1 a 1 67* a Q I: s ll 0 a e 5 I Z I 0 J/ g 49 0v Q o a 6 o 0 ff i Q Q 6 Q 0 a o \h/ 2 ll- 4/ 4/ I0 y .36 if .11

I Inventor: 7/ Edward W. Roessler,

HR "btor'hey.

Nov. 26, 1935. E. w.RoEssLER AIR CONDITIONING APPARATUS 3 Sheets-Sheet 3 ,Filed July 27, 1954 VEEE Elia-nabs Ed y???" I waroess er,

His Abbot-neg.

Patented Nov. 26, 1935 UNITED STATES am oonmrromc arrsaa'ros Edward W. Roessler, Schenectady, N. Y.. asslgnor to General Electric Company, a corporation or New York.

Application July 27. 1934. Serial No'. warms 2c Claims.

My invention relates to air conditioning apparatus.

An object of my invention is to provide an improved unit room air conditioning apparatus which produces even distribution oiair in the room, which can be readily manufactured, assembled and installed. and in which the working parts'are readily accessible.

Further objects and advantages of my invention will become apparent as the following description proceeds, and the features of novelty which characterize my invention will be pointed out with particularity in the claims annexed to and forming a part of this specification.

For a better understandingof my invention reference maybe had to the accompanying drawin'gs in which Fig. 1 is a front elevation partly in section of ,an air conditioning apparatus embodying my invention; Fig. 2 is a plan view partly in 20 .Fig. 1;. Fig. 4 is a detail view of the mechanism for operating the outlet louvers shown in Figs. 1 and 3; Fig. 5 is a partial side elevation partly 25 broken away, showing another arrangement for operating the outlet louvers, the outer casingbeing removed from the apparatus; Fig. 6 is a further-modification of the louver operating mechanism; .and Fig. '7 is a-perspective view. partly in 30 .in Figs. 1 to 3.

Referring to the drawings, the airconditioning apparatus shown and described herein comprises an inner casing ill and an outer casing 30 spaced v apart to provide an air mixing chamber 30a. Both'jfresh air and air from the room to be conditioned are admitted to the mixing chamber, the fresh airbeing admitted at the rear through a damper controlled opening 25,'and the-room air through louvers 33 and openings 3'l. ,g The inner casing is provided with blowers I2 whichdraw air through filters 22 and23 covering openings 20 a both ends and through the top of the casing an circulate it through a U-shaped duct Ila formed by a baille l-l extending longitudinally through the center of the casing. Heat exchange elements comprising heating-coils l4 and cooling coils and a humidifying pan 60 are arranged in the U-shaped duct to condition the air passing therethrough. Theconditioned air is discharged at the front of the casing through aligned openings l9 and 3|. In the discharge opening I! at the front of the inner casing is arranged a shutter m "II which operates normally to direct section of the apparatus shown in Fig. 1; Fig. 3' is an enlarged sectional view on the line 33 ofsection, of the inner casing construction shown being admitted at "the ends of the apparatus (Cl. 25'I9) o the air upwardly andwhich directs the air downwardly when it is being heated. I

. Referring now to Figs. 1, 2, 3 and 7, I have shown an air conditioning apparatus of the type used to condition the air in rooms, and ordinarily 5 to be arranged in the room to be conditioned. The apparatus includes an inner casing l0, which is supported above the floor on legs II. This casing, which is shown in perspective in Fig. 7, is of a rectangular form, open at the top, and closed 10 "at the bottom by a base-62, which serves as a drain pan. One end only of the apparatus is shown in section in Fig. 1; however, the ends are similar and symmetrical, except that the various connections for admitting heat exchanging medium to the heating and cooling elements are lo-' cated at the end shown in section. Wlthinthe casing H) are two fans or blowers l2 arranged on either side of a motor 13 and driven by the motor.

The blowers are supported within the casing on a partition H, which is attached tobrackets I 5 and I6 secured to the side walls of the casing, and dividing the casinginto upper and lower chambers. The lower chamber is provided with a partition or baiile "extending across the chamher parallel to the front of the casing and dividing the chamber so as to form a U-shaped duct. This duct has inlet openings IS in the partition to provide communication at one end with the blowers l2, and an outlet opening I9 in thefront wall of the casing Ill through which air is discharged into the room. The upper chamber, which is open at the top, is provided with circular openings 20 at each end. Filters 22 and" of. glass wool, or other suitable material, are placed over the openings 20, and over the open top of the casing l0, respectively, to clean the air and prevent dust and other foreign matter from entering the inner casing.' The rear wall 24 of the inner casing is extended upwardly from the casing and 40 An outer casing ll, which is open at the maiand bottom, surrounds the inner casing in spaced relation to provide a chamber'or air space between the inner and outer casings at the top and sides. thereof. The upper portionand sides of the casing it at closely about the extended rear wall of 56 casing. The outer casing is also provided with the inner This outer casing may readily be removed to gain access to the inner casing and the working parts of the air conditioning appara.- tus. The outer casing estends nearer the inner casing at the front'than at the sides and is provided with an opening 3| having a frame 32 registel-ing with the outlet opening IQ of the inner may be adjusted by turning threaded pp'rtions 35 of the legs II to change the length of the "legs and then looking them in place by threaded nuts- 35a. In this manner the position of the fresh air duct 26 may be adjusted to the height ofa window or other opening in the wall of the room.

In order that the outer casing'30 may be adjusted to the proper height with respect to the inner casing, it is provided with a base made of a plurality of. stacked channel strips 36.which are" removable and any number of which may be employed to secure the proper height of the casing above the floor. Each of the strips 36 comprises a channel bent in U-shaped form so as tolie along the base of the side and front walls of the casing and provided with angles 31 welded to the channels to secure them in assembled relation.

When the proper height of the cabinet'has been determined the angles 31 may be bent over, or

r the strips 36 may be otherwise secured to eachother to provide a rigid base.

When the fans l2 are in operation air is drawn from out-of-doors through the duct 26, and from the room through the louvers 33 and into the space or chamber between the inner and outercasings from which the air passes through the filters 22 and 23 into the upper or blower chamber as indicated byarrows in Fig. 7. The air then enters the blowers, and is forced through the openings l8 into the lower chamber, passesaround the baflle l1, and out through the openings l9 and 3| inthe inner and outer casings respectively. The amount of fresh air admitted may be varied by changing the position of. a damper 31 which is pivotally mounted in the fresh air opening 26 on the pins 38 at the ends of the opening. The damper may be operated from the front of the casing by turning a knob 39 mounted on a shaft 40, and connected to operate the damper through a link 4|, a door 42 being provided in the outer casing 30 to afford access to the knob 39.

The air passing through the inner casing may be either heated or cooled according to the requirements of the room to be conditioned. In the construction illustrated a heating element 43 comprising a plurality of steam or hot water coils 44 having fins 45 thereon is arranged in the rear portion of the lower U-shaped chamber, and a cooling element 46 comprising a plurality of refrigerant coils 41 having flns 48 thereon is arranged in the front portion of the lower U-shaped' chamber, the baflie ll extending between the heating and c ling elements, Thus, when air is circulated by the blowers l2, it passes downwardly .over the heating element andupwardly'over the cooling element.- Theconnections and valves for the heating and-cooling elements may conveniently be placed in the space between the inner and outer casings at one end of the inner casing,

as clearly shown in Fig. 1. construction shown,- a heating medium such .a's steam or hot water is supplied to the coils 44 from any suitable source througha conduit 43, and the quantity thereofis regulated by a valve 53 which is controlled by a solenoid 5|,or other suitable de- 5 vice operated by a thermostat arranged in the room to be conditioned. Refrigerant is supplied to the cooling element 46 through a-conduit 52, the quantity of refrigerant supplied being regulated by an automatic valve 53, which is con- 10 nected to the refrigerant coils 41 by a conduit 54. The valve 53 is arrangedto maintain a constant predetermined temperature in the coils 41, and, for this purpose, may be provided with expansible bellows communicating through a tube 15 55 (like that shown in Fig. 5) to a bulb containing a volatile liquid and arranged to respondto the temperature of the coils 41. Gaseous re;- frigerant is removed from the coils 41 through a connection 56 and is returned to the source. The :0

supply of refrigerant to the vafve 33 may be regulated by a thermostat responsive to the temperature of the room to be cooled.

Either the heating element 43 or the cooling element 46'may be placed in operation by a manual control arranged on the inner vcasing. When the apparatus is set for heating the source of heating fluid is regulated by a thermostat re- ,sp'onsive to room temperature, and when the apparatus is set for cooling the source of refrigerant is regulated by the same thermostat responsive to room temperature. Only one of. the elements may be set for operation at any given time. The manual control for selectingthe heating or cooling operations includes a knob i'larranged on a panel 58 together with the damper control knob 39 on the front of the inner casing A thirdknob 59. indicated in dotted lines in Fig. 1, may be pro-- vided to regulate the operation of the fan motor l3. All of these knobs are accessible through the door 42 in the outer casing 30.

When the air passing through'the apparatus is being heated it is humidified by p over a body of water-contained within a tray extending between the sides of the inner casing immediately beneath the heating coils 44 and "resting on brackets 6| at the ends of the inner casing. Water is supplied to' this tray, only, during the heating, operation, through a control valve from any suitable source of supply, such as ,the water system of the building in which the.

' on the cooling .coils n will also mu into the bottom 62 of the casing and flow through the drain From the foregoing it is apparent that the ap- 6b paratus illustrated will supply, either cooled or heated air as desired. The heated air will nat; urallytend torise on leaving the outlet while the cooled air will fall toward the floor; Therefore, when the apparatus is being used to cool the 65 room there will be a tendency for the freshly cooled air to remain in the lower part of the room; and when the apparatus is being used to heat the'room there will be a tendency for the freshly heated air torise to the upper portion of the room, and thereby prevent a propermixina of the conditioned air and the airwithin the room.' In order to avoid this undesirable conditicn, I provide an' arrangement whereby the the room and the heated air is directed toward the floor. In this manner, there is a forced circulation of the air'supplied to the room away from that portion of the room toward which it is naturally tends to move, and there is therefore a complete mixing of. the conditioned air and the air inthe-room. A I

In the construction illustrated I provide a plurality of arcuate louvers or deflectors 85, 'which are arranged longitudinally of the opening l9, and which may be moved into either of two positions selectively to direct the air either upwardly or downwardly from the outlet opening. Each of the'louvers is provided with triangular ears 95a at its opposite ends pivoted on pins 69 secured to inturned flanges 91 at the ends of the opening. These louvers are linkedtogether by a bar 98 pivoted at 89 to the ends of the ears 95a, so that the louvers may be moved in unison. When the louvers 65 are in the position shown in Fig. 3, the air passing outwardly through the opening I9 is directed upwardly. This is the normal position for the louvers when the air passing through the apparatus is not being heated. When the air is heated the'louvers 65 are shifted on the pivots 66 so that the air leaving the opening I9 is directed downwardly, one of the louvers being shown in this position 'inFig. 6.- Any suitable device may be provided ior shifting the 39 louvers to change the direction of the air discharged through the outlet l9. This device may be either manual or automatic. However, I prefer to providean arrangement whereby the louvers-arenormall'y biased to a position for directing the air upwardly and including an automatic mechanism which will operate to shift the louvers and direct the air downwardly whenever the, air-is being heated. V

In the construction illustrated in Figs. 1 to 4 an automatic heat responsive device I9 is located at one side of the opening I9. This device is a stop as. A uie link is rotated, the pivot 10 clearly shown in detail in Fig. 4, and includes an expansible bellows filled with a volatile liquid,

45 biased to a position for holding the louvers 65 so asto direct the air upwardly as it is discharged from. the opening I9. This device is mounted on a bracket I4 at one side of the opening I9 so that the bellows II is located in the stream of air passing through the apparatus and out through the discharge opening I9. The link I2 is pivoted to the bracket I9 at I5, and the link-I3 is pivoted to the link I2 at 19 and is connected to the lowermost louver by a pin 99 engaging a slot TI in the link 13 to provide a sliding connection. In the position shownin Fig. 4

the link I2 is held against the stop 19 by a helical compression spring i9 arranged between a sup'-- port 89 secured to-the bracket 14 and a flange 8i on the link It. The link 13' is held against a stop 82 by an over-center tension spring 83 connected to the end 94 of the link i3 and to an arm 99 extending downwardly from the support 89'.

55 the louver 95 in its uppermost position and the ,air passing through the opening I9 is directed upwardly. ,The bellows II is secured to the bracket and links I2 and I3 comprising a lever system.

In this position. the link I3 holds the pin 99 on passes overthe center of spring 89, which snaps the link 19 downwardly against a stop 89, and thereby rotates the louvers 95 about the pivots 89. The louvers now direct downwardly the air passing outwardly through the opening l9. The louverswill be maintained in this positionas long as the temperature of the air remains above a predetermined value. When the temperature is lowered again below this value the bellows ll will contract and the spring 19 will rotate the link I2 in a counter-ciockwise direction about the pivot and return the device to the position shown in Fig. 4. This arrangement therefore operates automatically to maintain a proper cir- '15 culation of air within a room whether the air passing through the apparatus is being heated,

cooled or merely circulated, and uneven temperatures about the room are thereby prevented.

In Fig. 5 is shown another device for controlling the shifting of the louvers in the outletopening. The device here illustrated comprises-a lever '99 pivoted at 9| tola stationary arm 92 secured to a bracket 93 on the outer wall of the inner casing I9. An offset portion 99a of the lever 99 extends through an, opening 99b in the casing and is connected by a slot 94 and a pin 95 to the bar 68 which operates the louvers 95. The lever 99 is held by a tension spring 99 in aposition so that the louvers 95 direct the air upwardly. An ex- 3 pansible bellows 91 supported on the bracket 93 and secured to the lever 99 by a bolt' 98 communicates through a tube 99 with a bulb containing a volatile liquid and arranged within a cap I99 in contact with one or the heating coils.

downwardly. In order to move the lever 99 with.

a snap action thereisprovided an over-center compression spring l9l mounted on a rod I92 which is loosely mounted'in lugs I93 and I99 secured on the lever 99 adjacent the portion 99!:

1 and on the wall of the casing respectively. It

is apparent that, inthis arrangement, when the coils 44 are heated the bellows 9l will expand and shirt the louvers 95 to direct the heated air downv wardly toward the door of the room Under some conditions of operation it may be desirable to arrange the automatic control for shifting the direction of the air discharged from the outlet of the conditioning apparatus, sothat the air will .be directed downwardly only when the control of ,the heating element'is set for heating and the air is being heated. In order to accomplish this, I provide an arrangement such as that shown in Fig; 6., In the construction illustrated thecontrol device is in position for directing the heated air downwardly. This control comprises a bellows I95, shown in its expanded position, mounted ina bracket I96 which may be I secured to the wall of the casing in a position similar'to that of the device I9 shown in Fig. 3. The bellows is arranged to actuate the bar 98 through a bell-crank I9? to which it is connected by a bolt I99. The bellows I95 may be actuated to expand and move the louvers to the 79 position shown only when the air circulated within the ducts of the apparatus is above a predetermined temperature. This is accomplished by providing a thermostat such as a bimetallic strip I99 in the path of the air circulated in the front portlon-of the U-shaped duct of the unit, and by connecting the thermostat in a circuit including a switch llll which is closed only when the heat supply valve 50 is opened. when the circuit 5 is closed by operation of the thermostat 109 and theswitch 0,9. heating filament Ill arranged within aclosed vessel or boiler H2 filled with some suitable fluid is heated by the passage of current. This vaporizes or, expands the fluid contained within the vessel Ill and it is discharged through a connection-ll3 into the-bellows I05 which expands to operate the bell-crank and shift the louvers so that the louvers are in the position shown in Fig. 6 and discharge the air downwardly. The valve "may be controlled by a room thermostat which will operate a solenoid Ill to open the valve and close the switch H whenever heat is required. when the control circuit is opened, either by opening of the thermostat I09, or of the switch N0, the filament Ill will be disconnected and the fluid cooled. The bellows I will contract and rotate the bellcrank I01 in a clockwise direction, raise the pin N and shift the louvers 65 so that air discharged from the outlet will be directed upwardly. It is evident that this device will operate to shift the louvers todirect the air downwardly only when the thermostat in the air duct is closed and at the same ,time the heat supply valve is open? .During operation of the air conditioning apparatus illustrated the proportion of recirculated air drawn through the louvers 33 and opening 34, and fresh 'air supplied. through the duct 29 is controlled by operation of the damper 31. The recirculated air and fresh air mix more or less outer casing 30 and are drawn by the blowers l2 into the upper chamber of the casing l0, and

Ilover the heating element 43, upwardly around the cooling element 46 and out through the opening I! in the front of the cabinet. If the neatingelement 43 is not in operation 'the air Y discharged from the outlet I8, whether cooled or not, will be directed upwardly by e louvers 65. ,If the heating element is in ope tion and the air is being heated thereby, the louvers will automaticalLv be shifted to discharge the air downwardly. By this arrangement a very satisfactory'circulation of airwithin the room. is main- .t'airie'd together with a proper mixing of the room w air and conditioned air. The apparatus thus provides more even temperatures throughout the room and prevents cold draughts from circulating about the floor.

It. is apparent from the foregoing that I have provided an improved air conditioning apparatus While I have shown my invention as embodied in conditioning unit, other applications will readily. be apparent to those sldlleddn the art. I do not; therefore, desire my inve ntion to be limited to the .particular construction shown and described. and I intend in the appended claims to cover all modifications within the spirit 75 and scope-ofmy invention.

in the space between the inner casing ill and the from thence are forced by the blowers into, the l lower portion'of the chamber around the baillehaving an outlet which directs the conditioned whatI claim as new' and desire tosecure by Letters Patent of the United States is:

1. An air conditioning apparatus including a duct having an outlet, means for circulating air through said duct and for discharging air'theres from through said outlet, means for "heating air circulated through said duct, and means for normally directing upwardly the air discharged from said duct, said means being responsive to a predetermined heating" of the air circulated 10 throughsaid duct for directing downwardly the air discharged therefrom. I

2. An air conditioning" apparatus including a casing having an inlet and an outlet, means for circulating air through said casing and for disl5 charging 'air. therefrom through said outlet, means for heating the air within said casing. and means for normally directing upwardly the air discharged from said outlet, said means being responsive to a predetermined degree of heating 'of the air in said casing for directing downwardly the air discharged from said outlet.

3. An air conditioning apparatus including a .casing having aninlet and an outlet, means for circulating air through said casing and for 'discharging air therefrom through said dutlet, means including a pivoted deflector for directing upwardly the air discharged from said outlet, means for heating the air within said casing, and means responsive to a predetermined degree of $0 heating ofthe air in said casing for shifting said deflector so as to direct downwardly the air discharged from said outlet.

'4. An air conditioning apparatus including casing having an inlet and an outlet, means for circulating air-through said casing and for discharging 'air therefrom through said outlet, means including aplurality of deflectors for directing upwardly'the air discharged from said outlet, means for heating the airwithimsaid casmg, and means responsive to a predetermined degree of heating of the air circulated through said casing and including a linkage connecting said deflectors for shifting said deflectors so as to direct downwardly the air discharged from said outlet.

5. An air conditioning apparatus including a casing having, front, back and side walls, an air inlet for said casing, an air ou' let in the front wall 'of said casing, means for circulating air 50.

through said casing and for discharging air therefrom through said outlet, means including a plurality of deflectors for directing upwardly the air discharged from said outlet, means for heating the air within said casing, and means responsive to a predetermined degree of heaiing of the air in s'aid casing for shifting said de-, flectors so as to direct downwardly the air discharged from said outlet.

6. An air conditioning' apparatus including a 00 casing having an inlet and an outlet,- a duct in said casing connecting said inlet and said outlet,

a heater in said duct, a cooling element in said duct, means for circulating air through saldduct and for discharging air from said outlet, means for directing upwardly the air discharged from said outlet, and means-responsive to a predeter- T mined temperature of the air in said casing for 'directing downwardly the air discharged from said outlet. J '7. An air conditioning apparatus including a casing having an inlet and an outlet, a duct in .said casing connecting said inlet and said outlet,

a heating element in said duct, a cooling element in said 'duct, means for circulating air through said duct and for discharging air from said outlet, means for directing upwardly theair discharged from said outlet, and means responsive to a predetermined degree of temperature in said heating element for directing downwardly the air discharged from said outlet.

8. An air conditioning apparatus including af casing having an inlet and an outlet, a U-shaped duct in said casing connecting said inlet and said outlet, a heating element. arranged in one the outlet in said inner casing, means for cir-v -culating air from said chamber through said duct in said casing connecting said inlet and said 7 outlet, a heating element arranged in one leg of said duct, a cooling element arranged in the other leg of said duct means for circulating air through said duct and for discharging air from said outlet, means for directing upwardly the air discharged from said outlet, and means including a snap-acting lever responsive to a predetermined degree of heating of the air in said casing for "directing downwardly the air discharged from said outlet.

10. An air conditioning apparatus including.

an inner casing having an inlet and an outlet, an air filter covering the inlet insaid'inner casing, an outer casing surrounding said inner casing and forming a chamber between said casings, said outer casing having an opening registering with the outlet in said inner casing, means for admitting air to said chamber, means arranged within said inner casing for circulating air from said chamber through said inner casing and for discharging air through said outlet, and means arranged within said inner casing'for varying the temperature of the air circulated there through.

11."An air conditioning apparatus including an inner casing having an inlet and an outlet, an air filter'covering said inlet, 'an outer casing surrounding said inner casing" and forming a chamber between said casings, means for 'admitting fresh air to said chamber, means for admitting recirculated air to said chamber, said outer casing having an outlet registering with inner casing and for discharging said air through said outlet, and means for varying the temperature of the, air circulated through said inner casing. u

12. An air conditionirm apparatus including a casing having an extension on one wall thereof and having an inlet and an outlet, an air filter covering said inlet, a second casing surrounding.

said first mentioned casing and cooperating with I said extended wall to form a chamber between said casings, means including an opening in said extended wall for admitting air to said chamber,

means arranged within said first mentioned casl ing for discharging air therefrom through said outlet, and means arranged within said first mentioned casingfor varying thetemperature of the air discharged therefrom. a

13. An air conditioning apparatus including a casing having an extension on one wall thereof and having" an inlet and an outlet, an air filter coveringsaidinlet, a second casing surroundin said first mentioned casing and cooperating'with said extendedwall to form a chamber between said casings, means including an opening in said extended wall for admitting fresh air to said i 5 chamber, means including an opening in said second casing for admitting recirculated air to said chamber, means arranged within said first mentioned casing for discharging air therefrom through said outlet, and-means arranged within said first mentioned casing for varying the tem-. perature of the air discharged therefrom.

14. An air conditioning apparatus including a casing having an extension on one wall thereof and having an inlet and an outlet, an air filter cove g said inlet, a second casing surrounding said 'firstmentioned casing and cooperating with said extended wall to form a chamber. between saidcasings, means including an opening in said extended wall for admitting fresh air to said chamber, means including an opening in said second casing for admitting recirculatedl air to said chamber, means arranged within said first mentioned casingfor discharging-air therefrom through said outlet, means for controlling the quantity of fresh air admitted to said chamber, and means arranged within said'first mentioned casing for varying the temperature of the air discharged therefrom. 15. An air conditioning apparatifs including a casing having an extension on one wall thereof and having an inlet and an outlet,- an air filter covering said inlet, a second casing surrounding said first mentioned casing and cooperating with said extended wall tojform a chamber between 35 said casings, means including an opening in said "extended wall for admitting fresh air to said chamber, means including an opening in said second casing for admitting recirculated air to said chamber,means arranged within said first 40- mentioned casing for discharging air therefrom through said outlet, means for controlling the quantity of fresh air admitted to said chamber,

means including a heating element and a cooling element arranged within said first mentionedw casing for varying the temperature of the air discharged therefrom, means for normally directing upwardly the air discharged from said outlet, and means responsive -to a predetermined degree of heating of the air circulated within said first mentioned casing for directing down-. wardly the airdischarged from said outlet.

- 16. An air conditioning apparatus including a casing having an air inlet andean air outlet, a fresh air intake duct secured to said casing, 55, means arranged within said casing for discharging air therefrom through said outlet, means arranged within said casing for varying the temperature of the air discharged therefrom, means arranged to adjust the height of said casing above the fioor on which it rests for varying theheight of said duct above said fioor,- a second casing surrounding said first mentioned casing and forming a chamber between said casings, and

means for'adjusting the "height of said second ca casing to conform with the casing.

17. An air conditioning apparatus including a height of said first casing having an air inlet and an air outlet, a'' fresh air intake duct secured to said casing, means '10.-

arranged within said casing for discharging air therefrom through said outlet, means arranged within said casing for varying the temperature of the air discharged therefrom, means arranged to adjust the height of said casing above the ilooron'which it rests for varying the height of said duct above said floor, a second casing surrounding said first mentioned casingand forming a chamber between said casings, and means in-- 'cluding a plurality of detachable stri'ps at the base of said second casing for adjusting the height of said second casing to conform with the height of said first casing. t

18. An air conditioning apparatus including plurality of walls and having .an air inlet-and an an outlet, one of the walls of said casing being extended above said casing, a. fresh air intake duct secured to the extended portion of said one wall, means arranged within said casing for discharging air therefrom through said outlet,

means arranged within said casing for varying the temperature of the air discharged therefrom;

means for adjusting the height of said casing 'abovethe floor on which it rests for varying the height ofsai'd duct above the floor, a second casing surrounding said first mentioned casing and cooperating with said extended wallvto form a chamber between said casings, and means in-;

wall and communicating with the opening therein, means arranged within saidv casing for discharging air therefrom through said outlet,

means arranged within said casing for varying f the temperature of the air discharged therefrom, means arranged to adjust the height of said casing above the fioor on which it rests for'varying the height of said duct, above said floor, a second a casing comprising front, side and top walls and cooperating with the rear wall of said first men- .tioned casing to form a chamber between said casings, said second casing having an outlet opening corresponding with the air outlet in said first mentioned casing and communicating therewith, and means for adjusting the height of said second casing to conform with the height of said first casing. I 3 i v J 20. 'An air conditioning apparatus including a casing, means for circulating air 'throughsaid casing and for discharging air therefrom, means for selectively directing the air discharged from v .said casing in an upward direction or in a downward direction, said last mentioned means being arranged normally to direct the air discharged from said casing in one of said directions,'means including a heat exchange element arranged within said casing for-varying the temperature of the air therein, means for admitting a heat exchanging medium to said element, and means responsive to the admission of heat exchanging medium to said element for operating said se- ,lective directing means to direct the :air discharge from said casing in the'other of said directions.

casing, means for circulating air through said casing and for discharging air therefrom, means mselectively directing the air discharged from said casing in an upward direction or in a down ward direction, said last mentioned means being arranged normally to direct the air discharged from said casing in one of said directions, means Said portions of said enclosure.

a W 2,o22,s2s 7 including a heat exchange"eleme'nt arranged within said casing for varying the temperature of the air therein, means for admitting aheat exchanging medium to said element,- means for controlling said heat exchanging medium admitting means, and means responsive to the operation of saidcontrolling means for operating said selective directing means to direct the air discharged from said casing in the other of said directions.

22. An air conditioning apparatus including a casing, ,means for circulating air through said casing and for discharging air therefrom, means v for selectively directing the air discharged from said casing in an upward direction or in a downward direction, said last mentioned means being '15 arranged normally to direct the air from said casing in one .of said directions, means including a heat exchange element arranged within said casing for varying the temperature of the air therein, and means dependent upon go a predetermined range of temperature of the air -the air discharged from-said outlet, said last mentioned means being dependent upon opera- 35 tion of said control means to admit heating medium to said heating element for directing down- 'wardlythe air discharged from said outlet. -24. Apparatus for conditioning the air an enclosure including a casing, means for circu- 4o lating air through said casing and for discharging air therefrom, means for selectively directing the-air discharged from said casing toward the upper. portion ofsaid enclosure, or .toward the lower portion of said enclosure, said last meni5 tioned means being arranged normally to direct the air discharged from said casingtoward one of said portions of said enclosure? means includring a heat exchange element arranged within said casing for varying the temperature of the ,air so therein, and means dependent upon a predetermined range of temperature of the air circulated through said casing for operating said selective directing means to dlrectthe air discharged from said casing towarm the other of said portions'of 55 said enclosure. I 25. Apparatus for conditionil l he air within an enclosure including a casing, means for-circulating air through said casingand fo'r discharging air therefrom, means for-selectively di- Q0 recting 'the air discharged from said casing toward the upperportion of said enclosure or toward thelower portionof said enclosure, said last mentioned means being arranged normally to direct the air discharged from said casing to 66 ward one of said" portions of said enclosure,

I moans including-a heat exchange element ar- 21. air conditioning apparatus includinga ranged within said casingfor varying the temperature of the air therein, means for admitting a heat exchanging medium to. said element, and 70 means responsive to the admission of heat exchanging medium to. said element'for operating s'aid selective directing means to direct the air discharged from said casing toward the other of 1 .26. Apparatus for conditioning the air within an enclosure including a casing, means for cir-,

culating air through said casing and for discharging air therefrom, means for selectively di-' recting the air discharged from said casing toward the upper portion of said enclosure or toward the lower portion of said enclosure, said last mentioned means being arranged normally to direct the air discharged from said casing tovward one of said portions of said enclosure,

' means including a heat exchange element arranged within said for varying the temmeans foreontrolling said heat excha i medium admitting means, and means responsive to the operation of said controlling means for operating said selective directing means to direct the air discharged from saidcasing toward the other of said portions of said enclosure.

EDWARD W. 

